/*
* ======== SPICC3200DMA_initHw ========
*/
static void SPICC3200DMA_initHw(SPI_Handle handle)
{
SPICC3200DMA_Object *object = handle->object;
SPICC3200DMA_HWAttrs const *hwAttrs = handle->hwAttrs;
/* Configure the SPI peripheral */
MAP_SPICSDisable(hwAttrs->baseAddr);
MAP_SPIDisable(hwAttrs->baseAddr);
MAP_SPIReset(hwAttrs->baseAddr);
/*
* To support 4-32 bit lengths, object->dataSize must be formatted to meet
* hardware requirement.
*/
MAP_SPIConfigSetExpClk(hwAttrs->baseAddr,
MAP_PRCMPeripheralClockGet(hwAttrs->spiPRCM),
object->bitRate,
mode[object->spiMode],
frameFormat[object->frameFormat],
(hwAttrs->csControl | hwAttrs->pinMode |
hwAttrs->turboMode | hwAttrs->csPolarity |
((object->dataSize - 1) << 7)));
/* Enable FIFOs, DMA, & interrupts */
MAP_SPIFIFOEnable(hwAttrs->baseAddr, SPI_RX_FIFO | SPI_TX_FIFO);
MAP_SPIDmaEnable(hwAttrs->baseAddr, SPI_RX_DMA | SPI_TX_DMA);
MAP_SPIFIFOLevelSet(hwAttrs->baseAddr, object->txFifoTrigger,
object->rxFifoTrigger);
}
static void ReadSPI(unsigned char* pIn,unsigned char* pOut,unsigned long ulLen)
{
// Reset SPI
MAP_SPIReset(GSPI_BASE);
// Configure SPI interface
MAP_SPIConfigSetExpClk(GSPI_BASE,MAP_PRCMPeripheralClockGet(PRCM_GSPI),
20000000,SPI_MODE_MASTER,SPI_SUB_MODE_3,
(SPI_HW_CTRL_CS |
SPI_4PIN_MODE |
SPI_TURBO_ON |
SPI_CS_ACTIVEHIGH |
SPI_WL_8));
// Enable SPI for communication
MAP_SPIEnable(GSPI_BASE);
READ_FROM_SPI;
unsigned char tmpbuf[2];
MAP_SPITransfer(GSPI_BASE,
pOut,
pIn,
ulLen,
SPI_CS_ENABLE|SPI_CS_DISABLE);
MAP_SPIDisable(GSPI_BASE);
}
int main()
{
interrupt_count = 0;
transfer_count = 0;
tx_count = 0;
rx_count = 0;
uint32_t output_count = 0;
uint32_t sum = 0;
init();
// initialize buffers with some known value
memset(tx_buffer,0x55,sizeof(tx_buffer));
memset(rx_buffer,0x22,sizeof(rx_buffer));
// configure SPI
MAP_SPIReset(GSPI_BASE);
MAP_SPIConfigSetExpClk(GSPI_BASE,MAP_PRCMPeripheralClockGet(PRCM_GSPI),
SPI_IF_BIT_RATE,SPI_MODE_SLAVE,SPI_SUB_MODE_0,
(SPI_HW_CTRL_CS |
SPI_4PIN_MODE |
SPI_TURBO_OFF |
SPI_CS_ACTIVEHIGH |
SPI_WL_8));
MAP_SPIIntRegister(GSPI_BASE,interrupt_handler);
MAP_SPIIntEnable(GSPI_BASE,SPI_INT_RX_FULL|SPI_INT_TX_EMPTY);
MAP_SPIEnable(GSPI_BASE);
Message("Enabled SPI Interface in Slave Mode!\n\r");
Message("Starting while\n\r");
while(1)
{
memcpy(tx_buffer,rx_buffer,TR_BUFF_SIZE);
// here we could also change the tx_buffer
// e.g. tx_buffer[TR_BUFF_SIZE - 1] = 18;
sum = 0;
if(output_count < transfer_count)
{
for(int i = 0; i < TR_BUFF_SIZE; i++)
{
sum += rx_buffer[i];
}
Report("The sum in the Rx buffer is: %d\n\r",sum);
Report("Checksum Rx buffer is: 0x%02x\n\r",crc(rx_buffer));
Report("interrupt: %d, tx: %d, rx: %d, transfer: %d\n\r",interrupt_count,tx_count,rx_count, transfer_count);
Message("TX-");
print_buffer(tx_buffer,TR_BUFF_SIZE);
Message("RX-");
print_buffer(rx_buffer,TR_BUFF_SIZE);
output_count++;
}
}
return 0;
}
STATIC void pyb_sleep_flash_powerdown (void) {
uint32_t status;
// Enable clock for SSPI module
MAP_PRCMPeripheralClkEnable(PRCM_SSPI, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
// Reset SSPI at PRCM level and wait for reset to complete
MAP_PRCMPeripheralReset(PRCM_SSPI);
while(!MAP_PRCMPeripheralStatusGet(PRCM_SSPI));
// Reset SSPI at module level
MAP_SPIReset(SSPI_BASE);
// Configure SSPI module
MAP_SPIConfigSetExpClk (SSPI_BASE, PRCMPeripheralClockGet(PRCM_SSPI),
20000000, SPI_MODE_MASTER,SPI_SUB_MODE_0,
(SPI_SW_CTRL_CS |
SPI_4PIN_MODE |
SPI_TURBO_OFF |
SPI_CS_ACTIVELOW |
SPI_WL_8));
// Enable SSPI module
MAP_SPIEnable(SSPI_BASE);
// Enable chip select for the spi flash.
MAP_SPICSEnable(SSPI_BASE);
// Wait for the spi flash
do {
// Send the status register read instruction and read back a dummy byte.
MAP_SPIDataPut(SSPI_BASE, SPIFLASH_INSTR_READ_STATUS);
MAP_SPIDataGet(SSPI_BASE, &status);
// Write a dummy byte then read back the actual status.
MAP_SPIDataPut(SSPI_BASE, 0xFF);
MAP_SPIDataGet(SSPI_BASE, &status);
} while ((status & 0xFF) == SPIFLASH_STATUS_BUSY);
// Disable chip select for the spi flash.
MAP_SPICSDisable(SSPI_BASE);
// Start another CS enable sequence for Power down command.
MAP_SPICSEnable(SSPI_BASE);
// Send Deep Power Down command to spi flash
MAP_SPIDataPut(SSPI_BASE, SPIFLASH_INSTR_DEEP_POWER_DOWN);
// Disable chip select for the spi flash.
MAP_SPICSDisable(SSPI_BASE);
}
void SPIInit(){
// Reset SPI
MAP_SPIReset(GSPI_BASE);
//Enables the transmit and/or receive FIFOs.
//Base address is GSPI_BASE, SPI_TX_FIFO || SPI_RX_FIFO are the FIFOs to be enabled
MAP_SPIFIFOEnable(GSPI_BASE, SPI_TX_FIFO || SPI_RX_FIFO);
// Configure SPI interface
MAP_SPIConfigSetExpClk(GSPI_BASE,MAP_PRCMPeripheralClockGet(PRCM_GSPI),
SPI_IF_BIT_RATE,SPI_MODE_MASTER,SPI_SUB_MODE_0,
(SPI_SW_CTRL_CS |
SPI_4PIN_MODE |
SPI_TURBO_OFF |
SPI_CS_ACTIVELOW |
SPI_WL_8));
// Enable SPI for communication
MAP_SPIEnable(GSPI_BASE);
}
/*!
\brief closes an opened spi communication port
\param fd - file descriptor of an opened SPI channel
\return upon successful completion, the function shall return 0.
Otherwise, -1 shall be returned
\sa spi_Open
\note
\warning
*/
int spi_Close(Fd_t fd)
{
unsigned long ulBase = LSPI_BASE;
g_SpiFd = 0;
//Disable Chip Select
MAP_SPICSDisable(LSPI_BASE);
//Disable SPI Channel
MAP_SPIDisable(ulBase);
// Reset SPI
MAP_SPIReset(ulBase);
// Disable SPI Peripheral
MAP_PRCMPeripheralClkDisable(PRCM_LSPI,PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
return 0;
}
static void Command(bool bPowerEn,
unsigned char ucZoom,
unsigned char ucGain,
unsigned char ucLine)
{
unsigned short usCommand = 0x0000;
if (bPowerEn)
usCommand |= 0x8000;
usCommand |= (ucZoom & 0x03) << 6;
//usCommand |= (ucGain & 0x3F);
usCommand |= (ucGain & 0x7E) >> 1;
TRACE("Gain: %d\r\n",ucGain);
usCommand |= (ucLine & 0x7F) << 8;
// Reset SPI
MAP_SPIReset(GSPI_BASE);
// Configure SPI interface
MAP_SPIConfigSetExpClk(GSPI_BASE,MAP_PRCMPeripheralClockGet(PRCM_GSPI),
20000000,SPI_MODE_MASTER,SPI_SUB_MODE_0,
(SPI_SW_CTRL_CS |
SPI_4PIN_MODE |
SPI_TURBO_ON |
SPI_CS_ACTIVEHIGH |
SPI_WL_8));
// Enable SPI for communication
MAP_SPIEnable(GSPI_BASE);
WRITE_TO_SPI;
unsigned char tmpbuf[2];
MAP_SPITransfer(GSPI_BASE,
(unsigned char*)&usCommand,
tmpbuf,2,
SPI_CS_ENABLE|SPI_CS_DISABLE);
READ_FROM_SPI;
MAP_SPIDisable(GSPI_BASE);
}
Fd_t spi_Open(char *ifName, unsigned long flags)
{
unsigned long ulBase;
unsigned long ulSpiBitRate = SPI_RATE_20M;
//NWP master interface
ulBase = LSPI_BASE;
//Enable MCSPIA2
MAP_PRCMPeripheralClkEnable(PRCM_LSPI,PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
//Disable Chip Select
MAP_SPICSDisable(ulBase);
//Disable SPI Channel
MAP_SPIDisable(ulBase);
// Reset SPI
MAP_SPIReset(ulBase);
//
// Configure SPI interface
//
MAP_SPIConfigSetExpClk(ulBase,MAP_PRCMPeripheralClockGet(PRCM_LSPI),
ulSpiBitRate,SPI_MODE_MASTER,SPI_SUB_MODE_0,
(SPI_SW_CTRL_CS |
SPI_4PIN_MODE |
SPI_TURBO_OFF |
SPI_CS_ACTIVEHIGH |
SPI_WL_32));
MAP_SPIEnable(ulBase);
g_SpiFd = 1;
return g_SpiFd;
}
/*!
\brief closes an opened spi communication port
\param fd - file descriptor of an opened SPI channel
\return upon successful completion, the function shall return 0.
Otherwise, -1 shall be returned
\sa spi_Open
\note
\warning
*/
int spi_Close(Fd_t fd)
{
unsigned long ulBase = LSPI_BASE;
g_SpiFd = 0;
if(g_ucDMAEnabled)
{
#ifdef SL_PLATFORM_MULTI_THREADED
osi_InterruptDeRegister(INT_LSPI);
osi_MsgQDelete(&DMAMsgQ);
#else
MAP_SPIIntUnregister(ulBase);
g_cDummy = 0;
#endif
MAP_SPIFIFODisable(ulBase,SPI_RX_FIFO);
MAP_SPIFIFODisable(ulBase,SPI_TX_FIFO);
MAP_SPIDmaDisable(ulBase,SPI_RX_DMA);
MAP_SPIDmaDisable(ulBase,SPI_TX_DMA);
}
//Disable Chip Select
MAP_SPICSDisable(LSPI_BASE);
//Disable SPI Channel
MAP_SPIDisable(ulBase);
// Reset SPI
MAP_SPIReset(ulBase);
// Enable SPI Peripheral
MAP_PRCMPeripheralClkDisable(PRCM_LSPI,PRCM_RUN_MODE_CLK|PRCM_SLP_MODE_CLK);
return 0;
}
Fd_t spi_Open(char *ifName, unsigned long flags)
{
unsigned long ulBase;
unsigned long ulSpiBitRate;
tROMVersion* pRomVersion = (tROMVersion *)(ROM_VERSION_ADDR);
//NWP master interface
ulBase = LSPI_BASE;
//Enable MCSPIA2
MAP_PRCMPeripheralClkEnable(PRCM_LSPI,PRCM_RUN_MODE_CLK|PRCM_SLP_MODE_CLK);
//Disable Chip Select
MAP_SPICSDisable(ulBase);
//Disable SPI Channel
MAP_SPIDisable(ulBase);
// Reset SPI
MAP_SPIReset(ulBase);
//
// Configure SPI interface
//
if(pRomVersion->ucMinorVerNum == ROM_VER_PG1_21 )
{
ulSpiBitRate = SPI_RATE_13M;
}
else if(pRomVersion->ucMinorVerNum == ROM_VER_PG1_32)
{
ulSpiBitRate = SPI_RATE_13M;
}
else if(pRomVersion->ucMinorVerNum >= ROM_VER_PG1_33)
{
ulSpiBitRate = SPI_RATE_20M;
}
MAP_SPIConfigSetExpClk(ulBase,MAP_PRCMPeripheralClockGet(PRCM_LSPI),
ulSpiBitRate,SPI_MODE_MASTER,SPI_SUB_MODE_0,
(SPI_SW_CTRL_CS |
SPI_4PIN_MODE |
SPI_TURBO_OFF |
SPI_CS_ACTIVEHIGH |
SPI_WL_32));
if(MAP_PRCMPeripheralStatusGet(PRCM_UDMA))
{
g_ucDMAEnabled = (HWREG(UDMA_BASE + UDMA_O_CTLBASE) != 0x0) ? 1 : 0;
}
else
{
g_ucDMAEnabled = 0;
}
#ifdef SL_CPU_MODE
g_ucDMAEnabled = 0;
#endif
if(g_ucDMAEnabled)
{
memset(g_ucDinDout,0xFF,sizeof(g_ucDinDout));
// Set DMA channel
cc_UDMAChannelSelect(UDMA_CH12_LSPI_RX);
cc_UDMAChannelSelect(UDMA_CH13_LSPI_TX);
MAP_SPIFIFOEnable(ulBase,SPI_RX_FIFO);
MAP_SPIFIFOEnable(ulBase,SPI_TX_FIFO);
MAP_SPIDmaEnable(ulBase,SPI_RX_DMA);
MAP_SPIDmaEnable(ulBase,SPI_TX_DMA);
MAP_SPIFIFOLevelSet(ulBase,1,1);
#if defined(SL_PLATFORM_MULTI_THREADED)
osi_InterruptRegister(INT_LSPI, (P_OSI_INTR_ENTRY)DmaSpiSwIntHandler,INT_PRIORITY_LVL_1);
MAP_SPIIntEnable(ulBase,SPI_INT_EOW);
osi_MsgQCreate(&DMAMsgQ,"DMAQueue",sizeof(int),1);
#else
MAP_IntRegister(INT_LSPI,(void(*)(void))DmaSpiSwIntHandler);
MAP_IntPrioritySet(INT_LSPI, INT_PRIORITY_LVL_1);
MAP_IntEnable(INT_LSPI);
MAP_SPIIntEnable(ulBase,SPI_INT_EOW);
g_cDummy = 0x0;
#endif
}
MAP_SPIEnable(ulBase);
g_SpiFd = 1;
return g_SpiFd;
}